Made setIceCandidateCallbacks similar to WebRtcPeer.addIceCandidate
Made setIceCandidateCallbacks similar to WebRtcPeer.addIceCandidate

This will allow to merge them to don't have duplicated code.

Change-Id: I17e01fcb7025f0daa7281b2b1a5c69b153d30f61

lcamacho/kurento-utils-js,shelsonjava/kurento-utils-js,shelsonjava/kurento-utils-js,lcamacho/kurento-utils-js